diff --git a/MiniEngine_Test.cpp b/MiniEngine_Test.cpp
index 8a36cb1..9e9db92 100644
--- a/MiniEngine_Test.cpp
+++ b/MiniEngine_Test.cpp
@@ -31,6 +31,10 @@ std::string GetMD5(unsigned char* buffer,unsigned int bufferLen)
     return str;
 }
 
+int CompareSurface(const Surface& surface1, const Surface& surface2, int allowableError)
+{
+    return SDLTest_CompareSurfaces(surface1.getRawPointer(),surface2.getRawPointer(),allowableError);
+}
 
 }/// End of namespace MiniEngine::Test
 
diff --git a/MiniEngine_Test.h b/MiniEngine_Test.h
index 879fa90..3d6389a 100644
--- a/MiniEngine_Test.h
+++ b/MiniEngine_Test.h
@@ -1,4 +1,5 @@
 #pragma once
+#include "MiniEngine.h"
 #include <string>
 
 namespace MiniEngine
@@ -9,6 +10,7 @@ namespace Test
 
 std::string GetMD5(unsigned char* buffer,unsigned int bufferLen);
 void GetMD5Raw(unsigned char* buffer,unsigned int bufferLen,unsigned char* outbuff);
+int CompareSurface(const Surface& surface1,const Surface& surface2,int allowableError);
 
 }/// End of namespace MiniEngine::Test